core: use X_OK when looking for executables

Other tools silently ignore non-executable names found in path. By checking
F_OK, we would could pick non-executable path even though there is an executable
one later.

diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index 701ed7487d52e437e67e6d56e94677d3bef24541..617adb848e08fc1eebfcc8f9db47bbc4a9b0dbff 100644 (file)
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -808,7 +808,7 @@ int config_parse_exec(
                                 if (!fullpath)
                                         return log_oom();
 
-                                if (access(fullpath, F_OK) >= 0) {
+                                if (access(fullpath, X_OK) >= 0) {
                                         free_and_replace(path, fullpath);
                                         found = true;
                                         break;